%------------------------------------------------------------------------------
% File : Drodi---4.1.1
% Problem : GRP561-1 : TPTP v9.3.1. Released v2.6.0.
% Transfm : none
% Format : tptp:raw
% Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% Computer : n004.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Thu Sep 24 12:34:40 PM UTC 2026
% Result : Unsatisfiable 0.09s 0.38s
% Output : CNFRefutation 0.09s
% Verified :
% SZS Type : Refutation
% Derivation depth : 16
% Number of leaves : 7
% Syntax : Number of formulae : 36 ( 36 unt; 4 def)
% Number of atoms : 36 ( 35 equ)
% Maximal formula atoms : 1 ( 1 avg)
% Number of connectives : 3 ( 3 ~; 0 |; 0 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 3 avg)
% Maximal term depth : 7 ( 2 avg)
% Number of predicates : 2 ( 0 usr; 1 prp; 0-2 aty)
% Number of functors : 9 ( 9 usr; 6 con; 0-2 aty)
% Number of variables : 56 ( 56 !; 0 ?)
% Comments :
%------------------------------------------------------------------------------
fof(f1,axiom,
! [A,B,C] : divide(divide(divide(A,inverse(B)),C),divide(A,C)) = B,
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f2,axiom,
! [A,B] : multiply(A,B) = divide(A,inverse(B)),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f3,negated_conjecture,
multiply(inverse(a1),a1) != multiply(inverse(b1),b1),
file('/export/starexec/sandbox/benchmark/theBenchmark.p') ).
fof(f4,plain,
! [X0,X1,X2] : divide(divide(divide(X0,inverse(X1)),X2),divide(X0,X2)) = X1,
inference(cnf_transformation,[status(thm)],[f1]) ).
fof(f5,plain,
! [X0,X1] : multiply(X0,X1) = divide(X0,inverse(X1)),
inference(cnf_transformation,[status(thm)],[f2]) ).
fof(f6,plain,
multiply(inverse(a1),a1) != multiply(inverse(b1),b1),
inference(cnf_transformation,[status(thm)],[f3]) ).
fof(f7,definition,
sF1_fnc = inverse(a1),
introduced(definition,[new_symbols(definition,[sF1_fnc])],[function_definition]) ).
fof(f8,definition,
sF0_fnc = multiply(sF1_fnc,a1),
introduced(definition,[new_symbols(definition,[sF0_fnc])],[function_definition]) ).
fof(f9,definition,
sF3_fnc = inverse(b1),
introduced(definition,[new_symbols(definition,[sF3_fnc])],[function_definition]) ).
fof(f10,definition,
sF2_fnc = multiply(sF3_fnc,b1),
introduced(definition,[new_symbols(definition,[sF2_fnc])],[function_definition]) ).
fof(f11,plain,
sF0_fnc != sF2_fnc,
inference(definition_folding,[],[f6,f10,f9,f8,f7]) ).
fof(f12,plain,
! [X0] : multiply(X0,b1) = divide(X0,sF3_fnc),
inference(paramodulation,[status(thm)],[f9,f5]) ).
fof(f13,plain,
! [X0] : multiply(X0,a1) = divide(X0,sF1_fnc),
inference(paramodulation,[status(thm)],[f7,f5]) ).
fof(f14,plain,
! [X0,X1,X2] : divide(divide(multiply(X0,X1),X2),divide(X0,X2)) = X1,
inference(forward_demodulation,[status(thm)],[f5,f4]) ).
fof(f17,plain,
! [X0,X1,X2] : divide(multiply(multiply(X0,X1),X2),divide(X0,inverse(X2))) = X1,
inference(paramodulation,[status(thm)],[f5,f14]) ).
fof(f20,plain,
! [X0,X1,X2,X3] : divide(divide(multiply(divide(multiply(X0,X1),X2),X3),divide(X0,X2)),X1) = X3,
inference(paramodulation,[status(thm)],[f14,f14]) ).
fof(f26,plain,
! [X0,X1,X2] : divide(multiply(multiply(X0,X1),X2),multiply(X0,X2)) = X1,
inference(forward_demodulation,[status(thm)],[f5,f17]) ).
fof(f32,plain,
! [X0] : divide(multiply(multiply(sF3_fnc,X0),b1),sF2_fnc) = X0,
inference(paramodulation,[status(thm)],[f10,f26]) ).
fof(f34,plain,
! [X0,X1,X2] : divide(X0,divide(multiply(X1,X0),multiply(X1,X2))) = X2,
inference(paramodulation,[status(thm)],[f26,f14]) ).
fof(f73,plain,
! [X0,X1,X2] : multiply(divide(multiply(divide(multiply(X0,sF3_fnc),X1),X2),divide(X0,X1)),b1) = X2,
inference(paramodulation,[status(thm)],[f12,f20]) ).
fof(f74,plain,
! [X0,X1,X2,X3] : multiply(divide(multiply(divide(multiply(X0,inverse(X1)),X2),X3),divide(X0,X2)),X1) = X3,
inference(paramodulation,[status(thm)],[f5,f20]) ).
fof(f603,plain,
! [X0,X1,X2] : multiply(divide(sF3_fnc,divide(divide(multiply(X0,inverse(X1)),X2),divide(X0,X2))),b1) = X1,
inference(paramodulation,[status(thm)],[f74,f73]) ).
fof(f633,plain,
! [X0] : multiply(divide(sF3_fnc,inverse(X0)),b1) = X0,
inference(forward_demodulation,[status(thm)],[f14,f603]) ).
fof(f634,plain,
! [X0] : multiply(multiply(sF3_fnc,X0),b1) = X0,
inference(forward_demodulation,[status(thm)],[f5,f633]) ).
fof(f642,plain,
! [X0] : divide(X0,sF2_fnc) = X0,
inference(backward_demodulation,[status(thm)],[f634,f32]) ).
fof(f684,plain,
! [X0,X1] : divide(multiply(X0,X1),divide(X0,sF2_fnc)) = X1,
inference(paramodulation,[status(thm)],[f642,f14]) ).
fof(f717,plain,
! [X0,X1] : divide(multiply(X0,X1),X0) = X1,
inference(forward_demodulation,[status(thm)],[f642,f684]) ).
fof(f740,plain,
! [X0] : multiply(sF2_fnc,X0) = X0,
inference(paramodulation,[status(thm)],[f642,f717]) ).
fof(f760,plain,
! [X0,X1] : divide(X0,divide(X1,X1)) = X0,
inference(paramodulation,[status(thm)],[f717,f14]) ).
fof(f824,plain,
! [X0,X1] : divide(X0,divide(multiply(sF2_fnc,X0),X1)) = X1,
inference(paramodulation,[status(thm)],[f740,f34]) ).
fof(f834,plain,
! [X0,X1] : divide(X0,divide(X0,X1)) = X1,
inference(forward_demodulation,[status(thm)],[f740,f824]) ).
fof(f853,plain,
! [X0] : divide(X0,multiply(sF1_fnc,a1)) = X0,
inference(paramodulation,[status(thm)],[f13,f760]) ).
fof(f896,plain,
! [X0] : divide(X0,sF0_fnc) = X0,
inference(forward_demodulation,[status(thm)],[f8,f853]) ).
fof(f1051,plain,
! [X0] : divide(X0,X0) = sF0_fnc,
inference(paramodulation,[status(thm)],[f896,f834]) ).
fof(f1083,plain,
sF2_fnc = sF0_fnc,
inference(paramodulation,[status(thm)],[f642,f1051]) ).
fof(f1115,plain,
$false,
inference(forward_subsumption_resolution,[status(thm)],[f1083,f11]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : GRP561-1 : TPTP v9.3.1. Released v2.6.0.
% 0.00/0.04 % Command : drodi -timeout(300) /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.09/0.36 % Computer : n004.cluster.edu
% 0.09/0.36 % Model : x86_64 x86_64
% 0.09/0.36 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.36 % Memory : 8046.5625MB
% 0.09/0.36 % OS : Linux 6.8.0-71-generic
% 0.09/0.36 % CPULimit : 300
% 0.09/0.36 % WCLimit : 300
% 0.09/0.36 % DateTime : Sun Sep 20 20:16:20 UTC 2026
% 0.09/0.36 % CPUTime :
% 0.09/0.37 % Drodi V4.1.1
% 0.09/0.38 % Refutation found
% 0.09/0.38 % SZS status Unsatisfiable for theBenchmark: Theory is unsatisfiable
% 0.09/0.38 % SZS output start CNFRefutation for theBenchmark
% See solution above
% 0.09/0.40 % Elapsed time: 0.035122 seconds
% 0.09/0.40 % CPU time: 0.118042 seconds
% 0.09/0.40 % Total memory used: 5.848 MB
% 0.09/0.40 % Net memory used: 5.758 MB
%------------------------------------------------------------------------------